Across
- 4. spreading solid material that is moved and deposited in a new location
- 6. ocean ridge a vast, continuous underwater mountain range, often spanning the globe, where tectonic plates are pulling apart
- 7. dating a scientific method that can accurately determine the age of organic materials as old as approximately 60,000 years
- 10. a linear zone on the seafloor where the Earth's tectonic plates are pulling apart from one another
- 11. Anomalies the total magnetic field minus the main magnetic field of the Earth leaving only the crustal magnetic field.
- 13. ooze a type of biogenic pelagic sediment located on the deep ocean floor
- 15. sediments solid fragments of inorganic or organic material that come from the weathering of rock and soil erosion.
Down
- 1. sediment marine sediment composed primarily of the skeletal remains of once-living organisms, such as plankton, mollusks, and corals, which collect on the ocean floor after the organisms die
- 2. tectonics the scientific theory explaining that the Earth's outermost layer, the lithosphere, is broken into large, moving slabs called tectonic plates
- 3. fossils that are so small they can only be identified and studied using a microscope
- 4. a geological process in which the oceanic lithosphere and some continental lithosphere is recycled into the Earth's mantle
- 5. boundary a strain gradient from relatively low-strain rocks outside the shear zone to progressively more highly strained rocks traced toward the center of the shear zone
- 8. a deep, narrow, elongated hole or depression in the ground or seafloor.
- 9. a geological fracture in the seafloor where two blocks of rock have moved relative to each other.
- 12. draft the movement of continents resulting from the motion of tectonic plates
- 14. ooze anything composed of or containing calcium carbonate (CaCO₃), which is the main component of limestone, chalk, and shells